Peerless-AV Multi-Display Ceiling Adaptor for Structural ceilingsOverview Specifications Structural ceiling plate includes integral high density rubber decoupler assembly to help prevent vibrations from damaging the equipment mounted. Unit has 1 1 2 11. 5 NPT fitting for attachment of fixed or adjustable length extension column. Ceiling plate attaches to concrete beam, slab, or other structural member. Model DCS200 supports single screen installations while DCS400 supports multi screen installations (see Peerless